But it wasn’t because the Queen of Pop was turned off by the “Mean Girls” star’s hard-partying ways, as might be expected, but because she’s actually jealous of the 23-year-old troubled starlet.

According to Contactmusic.com, Madonna ordered her security team to stop Lohan from entering her private booth at an opening party for the Boom Boom Room nightclub in New York because the singer is upset that the actress was chosen as an artistic adviser to fashion house Emanuel Ungaro.

Madonna, as well as Paris Hilton, was up for the position as well, and had even met with the label’s president Mounir Moufarrige to discuss becoming the artistic adviser herself.

Irish-American actress Lohan will make her debut for the Emanuel Ungaro label at Paris Fashion Week in October.